Morning All I have taken account of what Luis and Phillip said in their messages. I think I included a backtrace in my previous 'instiki' attachment, and also in this one, but let me know if you need more. I've followed the steps included in Luis' comments. I had to use 'ruby bundle show' as 'bundle show' didn't work. Only error now is '...msvcrt-ruby18.dll not found...' Only files I have installed are: c:\Devkit c:\Ruby192 c:\Instiki-0.19.1 I also installed the latest "gem install instiki" as Phillip suggested and a Ruby bundle updater (1.3.7) which I found on the web in response to a problem like mine. - In their default folders. This was after a complete system rebuild (yes I was that frustrated!) Hope that all makes sense. I have not run dk.rb since reinstalling JSON although I note it does take account of the Devkit path now, so I assume this does not matter. It was run previously and enhanced the rubies. Thanks for your help John Attachments: http://www.ruby-forum.com/attachment/5575/instiki.txt -- Posted via http://www.ruby-forum.com/.